Glad to hear of your ability in Yahoo and WeTransfer (not familiar with the product).
As a long time Apple user I use Safari and Apple Mail. Not the most attractive email product I do like the safety albeit there are certainly no guarantees.
Having to move to a new browser of any type seems not only an arduous task but also one that should not be a necessity.
It does appear others as well as you are having luck so I keep my fingers crossed in the hope the fix goes systemwide. There is large world of users suffering the same issue. Apple should be working on this problem a bit more diligently than its current pace.
Considering Apple is consistently adding security measures and promoting Safari as it does, this issue should be on the high priority level.
Being hacked once on Yahoo I shy away completely.
Thanks for the info Dominic.
Bummed it did not work for me.
Frustrating.
Cheers/Be Safe